WO2007147915A1 - Régulateur de débit pour diffuseur de liquide goutte-à-goutte - Google Patents

Régulateur de débit pour diffuseur de liquide goutte-à-goutte Download PDF

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Publication number
WO2007147915A1
WO2007147915A1 PCT/ES2007/000347 ES2007000347W WO2007147915A1 WO 2007147915 A1 WO2007147915 A1 WO 2007147915A1 ES 2007000347 W ES2007000347 W ES 2007000347W WO 2007147915 A1 WO2007147915 A1 WO 2007147915A1
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WO
WIPO (PCT)
Prior art keywords
slide
base body
regulator
configuration
drive sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/ES2007/000347
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English (en)
Spanish (es)
Inventor
Ramón PORTA CASBAS
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2007147915A1 publication Critical patent/WO2007147915A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line

Definitions

  • the present invention concerns a flow regulator for dispensing liquid drop by drop, which has application in the field of the clinic, for dispensing for example a serum or other liquid to a patient intravenously, or in the field of agriculture or gardening, to regulate drip irrigation devices.
  • Flow regulators are known for systems of administration of physiological serum or liquid medications to an intravenous patient based on devices adapted to throttle to a greater or lesser extent a flexible tubing that conducts the liquid from a container to an intravenous needle in order to increase or decrease the flow rate of the liquid flowing through said flexible tubing.
  • Such devices are generally very simple and inexpensive, but they have the disadvantage of being inaccurate and of not having the means to accurately determine a desired flow rate, so that the flow rate must be determined by scoring.
  • Document ES-1015866-U discloses a flow regulator for clinical drips constituted from a hollow base body, which at its lower end configures a coupling fitting to a fluid outlet duct and which in its middle area defines a core topped off in an internal conical trunk seat.
  • This core is surrounded by a helical ramp in which a cam plays on which a mobile bushing with a complementary conical sealing appendage of the aforementioned trunk-conical seat rests.
  • the core also comprises an upper base in which there are holes for fluid passage and an axial rod that plays in the hollow interior of an upper body, in which a coupling fitting is arranged to an inlet conduit.
  • This upper body is provided with a wide perimetric flange having its periphery fixed to the edge of an expansion of the base body.
  • the aforementioned mobile bushing incorporates a truncated conical diaphragm or membrane whose free edge is fixed, together with the perimeter flange of the upper body, to the frustoconical expansion of the base body.
  • the rod of the mobile bushing is provided with axial grooves on its outer surface that determine calibrated passages for the fluid, and with calibrated holes in its base.
  • a side wall of the bushing slides tightly over the core of the base body with the collaboration of a sealing gasket.
  • the movable bushing is constructed by a slightly elastic material, so that the membrane or diaphragm has, by virtue of its relative thinness, a pronounced elasticity.
  • the base body comprises windows through which said cam is accessible for manual actuation thereof in order to effect a regulation of the position of the obturator appendix of the movable bushing with respect to the frustoconical seat of the axial bore of the core and with it a regulation of the flow of the liquid through it.
  • the membrane or diaphragm acts to absorb pressure differences in the liquid in order to provide a constant flow regardless of the height of the liquid column.
  • US-A-6213986 describes a gravity flow control device comprising an upper ventilated chamber with an inlet port connected to a liquid source and a lower ventilated chamber with an outlet port connected to an outlet tube. Both chambers are coupled to each other by means of a threaded coupling and communicated through a valve.
  • a first buoy arranged to prevent or allow the entry of liquid into the upper chamber according to a predetermined level of liquid in the upper chamber. This ensures a constant pressure in the liquid of the upper chamber regardless of the height of the level of the liquid in the liquid source.
  • a second buoy arranged to prevent the entry or exit of liquid from the lower chamber as a function of maximum and minimum levels of liquid in the lower chamber.
  • the upper chamber has a concave truncated conical valve seat and the lower chamber has a finished rod in a convex truncated conical valve plug adapted to fit in said valve seat.
  • a lateral passage communicates the upper chamber with a space located below the valve seat, in which the valve plug moves.
  • Another central passage communicates said space with the lower chamber through the shutter and the rod.
  • the device of said patent US-A-6213986 has a very complex and voluminous construction, and its production cost is considerably high compared to devices based on. Flexible tube choke currently used.
  • Another drawback is that, because the inlet tube rotates in solidarity with the upper chamber and the outlet tube rotates in solidarity with the lower chamber, when one chamber rotates with respect to the other to effect a flow regulation of the inlet tube and / or the outlet tube may be crooked and experience unwanted strangulation or other damage.
  • the presence of ventilated chambers and buoys in the device prevents it from operating in a position different from the vertical position with the input port higher than the output port.
  • the present invention contributes to overcoming the above and other inconveniences by providing a flow regulator for dispensing liquid drop by drop composed, in its most essential embodiment, by three pieces: a base body, a slide and a drive sleeve.
  • Said base body defines an open housing at a first end, an outlet port at a second end, opposite the first, a valve seat at the bottom of said housing, and an exit passage that communicates the valve seat with said outlet port.
  • the valve seat has a concave truncated conical seating surface and the outlet port is adapted to couple an outlet tube.
  • the said slide defines a sliding portion adapted to slide fit in said housing of the base body, and has an inlet port at an outer end adapted to couple an inlet tube.
  • a valve plug is defined which has a convex truncated cone-shaped sealing surface complementary to said concave truncated conical seating surface of the base body.
  • An inlet passage communicates said inlet port with openings formed in said convex truncated conical sealing surface of the valve plug.
  • Said drive sleeve comprises first members of mechanical displacement means adapted to cooperate with second members of said mechanical displacement means formed in said base body and at least one drag configuration adapted to engage in a fitting configuration formed in said slide.
  • the mechanical displacement means comprise an internal thread coupling configuration, for example, an internal thread thread, formed in the drive sleeve and adapted to engage with an external thread coupling configuration, by For example, an external thread thread, formed in said base body, whereby a rotation of said drive sleeve with respect to the base body becomes a translation of the drive sleeve with respect to the base body.
  • the coupling between the slide and the base body is configured to prevent a rotation of the slide with respect to the base body while allowing a sliding displacement between the two
  • the coupling Between the drive sleeve and the slide is configured to allow a rotation of the drive sleeve with respect to the slide while ensuring the drag of the slide through the drive sleeve in the direction of said sliding movement between the slide and the base body.
  • the three parts that make up the flow regulator of the present invention are designed to be obtained by injection molding of a plastic material, and the assembly of the three pieces is extremely simple, so that the regulator can be manufactured at a competitive cost in relation to the existing flexible tube throttling based devices while incorporating as an additional function the possibility of accurately determining the desired flow rate, not available with the flexible tube throttling based devices.
  • the sliding portion of the slide can incorporate a perimetric shoulder to provide a tight sliding fit with the base body housing.
  • the regulator of the present invention includes a fourth piece in the form of a hydrostatic regulation element housed in a second seat formed in the base body between the valve seat and the outlet passage with possibility of displacement between a concave truncated conical seating surface of the second seat and the inner end of the slide.
  • This hydrostatic regulating element has a convex truncated conical surface complementary to said concave truncated conical seating surface. Stretch marks formed on said convex truncated conical surface of the hydrostatic regulation element ensure the passage of fluid from the valve seat to the outlet passage even when the hydrostatic regulation element is supported on said second seat.
  • the hydrostatic regulating element acts to maintain a substantially constant regulated flow independently of the liquid column connected to the inlet passage.
  • the hydrostatic regulation element By virtue of the freedom of movement of the hydrostatic regulation element, when the pressure of the liquid is high, the hydrostatic regulation element is supported against the surface of the second seat, limiting a maximum flow of liquid to the outlet passage.
  • the hydrostatic regulating element can gradually move away from the second seat to compensate for the decrease in pressure with an increase in the passage section.
  • the hydrostatic regulation element is automatically displaced by the reflux away from the second seat and opening a large section of passage tending to compensate the pressure difference.
  • the flow regulator of the present invention is that, by virtue of the absence of vented chambers therein, it is not very sensitive to changes in position and, in certain circumstances, can operate both vertically and inclined. Therefore, the flow regulator for dispensing liquid drop by drop can be sized and adapted for clinical applications, such as intravenous dispensing of sera and / or liquid medications, for agricultural or gardening applications, such as drip irrigation, or for other applications where it is necessary to dispense a liquid drop by drop with a relatively precisely regulated flow rate.
  • Fig. 1 is a cross-sectional view with an enlarged detail of a flow regulator for dispensing liquid dropwise according to an embodiment of the present invention
  • Fig. 2 is a sectioned perspective view of a base body that is part of the regulator of Fig. 1;
  • Fig. 3 is a perspective view of a slide that is part of the regulator of Fig. 1;
  • Fig. 4 is a sectioned perspective view of a drive sleeve that is part of the regulator of Fig. 1;
  • Fig. 5 is a cross-sectional view with an enlarged detail of a flow regulator for dispensing liquid dropwise according to another embodiment of the present invention;
  • Fig. 6 is an enlarged perspective view of a hydrostatic regulation element that is part of the regulator of Fig. 5; and Fig. 7 is an illustrative view of the possibility of operating the regulator with one hand.
  • Fig. 6 is an enlarged perspective view of a hydrostatic regulation element that is part of the regulator of Fig. 5; and
  • Fig. 7 is an illustrative view of the possibility of operating the regulator with one hand.
  • the flow regulator for dispensing liquid drop by drop comprises a base body 10 (shown separately in Fig. 2) which defines an open housing 11 in uh first end.
  • a valve seat 14 is formed which defines a concave truncated conical seating surface, and said valve seat 14 communicates with an exit passage 15 which leads into an exit port 12 located at a second end of the base body opposite the mentioned first end.
  • said outlet port 12 has the shape of a hollow rod adapted for coupling an outlet tube 48, in general a flexible tube plugged under pressure, as shown in Fig. 1, although Other types of coupling are within the scope of the present invention.
  • the base body 10 comprises a protective skirt 13 around the rod and reinforcing ribs 17 between said skirt and the rod.
  • a slider 20 is housed (shown separately in Fig. 3), which defines a sliding portion 21 adapted to slidably fit in said housing 11 and another portion protruding from the housing 11 of the base body 10.
  • an inlet port 22 is disposed, which, in this exemplary embodiment, is similar in configuration to the outlet port 12 mentioned above, adapted to couple an inlet tube 47 in The shape of a flexible tube plugged under pressure, although other types of coupling are also incorporated here.
  • a valve plug 24 is formed which defines a convex truncated conical sealing surface complementary to the said concave conical trunk seat surface of the valve seat 14 of the base body 10.
  • An inlet passage 25 communicates the port of inlet 22 with said valve plug 24. It will be seen from Fig. 1 that the free end of the valve plug 24 is closed and that said passage 25 communicates with openings 26 formed in the sealing surface Convex conical trunk of the valve plug 24. With this construction, the mentioned openings 26 of the valve plug 24 face the concave truncated seat surface of the valve seat 14 of the base body 10. A displacement of the slide 20 inside the housing 11 of the base body 10 will cause a movement of distance or approximation of the valve plug 24 with respect to the valve seat 14, increasing or decreasing a fluid passage area between the sealing surface of the valve plug 24 and the seat surface of the valve seat 14, which in turn will vary the flow rate of a fluid between the inlet tube 47 and the outlet tube 48.
  • the regulator of the The present invention incorporates a drive sleeve 30 (shown separately in Fig. 4) which comprises a coupling configuration nto to internal thread 36 in the form of a thread adapted for coupling with an external thread coupling configuration 16 formed as a conjugate thread on the base body 10.
  • a rotation of said drive sleeve 30 with respect to the base body 10 implies a linear translation of the drive sleeve 30 with respect to the base body 10.
  • the drive sleeve 30 also includes a drag configuration 37 which in operative situation is coupled to a corresponding fitting configuration 27 formed in the slide 20 , so that the aforementioned translation of the drive sleeve 30 with respect to the base body 10 implies a drag of the slide 20 by the drive sleeve 30, which produces the desired displacement of the slide 20 with respect to the base body 10 and the movement of distance or approximation of the valve plug 24 with respect to the valve seat 14.
  • the slide 20 it can adopt a closed position (shown in Fig. 1) in which the convex truncated conical sealing surface of the valve obturator 24 is in contact with the concave truncated conical seating surface of the valve seat 14 completely sealing the openings 26.
  • the sliding portion 21 of the slide 20 comprises at least one shoulder perimeter 46 adapted to press against an internal surface of the housing 11 of the base body 10 in order to provide a tight sliding fit between the slide 20 and the base body 10.
  • a perimetric annular race can be formed in which a sealing ring is provided to press against the internal surface of the housing 21 of the base body 10.
  • an outer surface of the sliding portion 21 of the slide 20 and a corresponding inner surface of the housing 11 of the base body 10 are cylindrical.
  • the slide 20 comprises one or more rotation retention configurations 28 that cooperate with corresponding rotation retention configurations 18 formed in the base body 10 to prevent a rotation of the slide 20 with respect to the base body 10 while allowing a sliding displacement between both. This ensures that the inlet and outlet tubes 47, 48 are always in the same relative angular position, thus preventing them from being twisted.
  • the said drag configuration 37 of the drive sleeve 30 is adapted to cooperate with said fitting configuration 27 of the slide 20 on purpose to allow a rotation of the drive sleeve 30 with respect to the slide 20 while ensuring the drag of the slider 20 by the actuating sleeve 30 in the direction of said sliding displacement between the slider 20 and the base body 10.
  • the passage 25 of the slider 20 is rectilinear, parallel to said sliding sliding direction between the slide 20 and the base body 10, and coaxial with the external thread coupling configuration 16 of said base body 10 and with the internal thread coupling configuration 36 of the actuating sleeve 30.
  • the passage of outlet 15 of the base body 10 is also rectilinear and is aligned with said passage 25 of the slide 20.
  • Figs. 1 to 4 shows an exemplary embodiment in which the said rotation retention configurations 28 of the slide 20 have the form of fins protruding from an outer surface of said sliding portion 21 and said rotation retention configurations 18 of the base body 10 have the shape of races formed on a surface of the housing 11. Said races 18 are provided with an open end to receive said fins 28 when the slide 20 is inserted into the housing 11 of the base body 10.
  • other forms for the rotation retention configurations that will be within the scope of the present invention will easily occur.
  • the drive configuration 37 of the drive sleeve 30 is in the form of a perimeter flange that extends inwardly and the fitting configuration 27 of the slide 20 is in the form of a neck adapted to receive said perimeter flange.
  • Said neck 27 is delimited by an annular surface 27b and a plurality of nails 27a facing said annular surface 27b.
  • Each of these nails 27a is formed in a respective elastic tongue 29, and said elastic tongues 29 are arranged together surrounding the inlet port 22.
  • the regulator illustrated in the figures is designed to be disposable, so easy disassembly is not provided.
  • other forms for the drag and fit configurations that will be within the scope of the present invention will easily occur to one skilled in the art.
  • the drive sleeve 30 comprises an annular wall 38 around the outlet port 22.
  • Figs. 5 and 6 shows another embodiment of the regulator of the present invention, which includes hydrostatic regulation means.
  • the regulator shown in Fig. 5 is completely identical to that shown and described above in relation to Figs. 1 to 4 except that, in the regulator of Fig. 5, the base body 10 comprises a second seat 45 provided with a concave conical seating surface formed between the valve seat 14 and the outlet passage 15. The angle of taper of the second seat 45 is less than the taper angle of the valve seat 14.
  • the regulator of the Fig. 5 also includes a fourth piece in the form of a hydrostatic regulation element 40, which is adapted to be housed in said second seat 45 with the possibility of free movement limited by the concave truncated conical seating surface of the second seat 45 and the inner end of the slide 20.
  • the said hydrostatic regulation element 40 (shown separately in Fig. 6) comprises a convex truncated conical surface 41 complementary to said concave truncated conical seating surface and grooves 42 formed in said convex truncated conical surface 41.
  • the grooves 42 go from one end to the other of the hydrostatic regulation element 40 to ensure the passage of fluid from the valve seat 14 to the outlet passage 15 even when the hydrostatic regulation element 40 is supported on said second seat 45.
  • a gap 43 adapted for To receive a pin 44 protruding from the inner end of the slide 20.
  • the function of the hole 43 and the pin 44 is to keep the hydrostatic adjustment element 40 attached to the slide 20 when the slide 20 is in an inverted position during the assembly of the assembly to facilitate the insertion of the slide along with the hydrostatic regulation element 40 into the housing 11 of the base body 10.
  • the fitting of the stud 44 in the recess 43 is sufficiently loose to ensure that the hydrostatic regulation element 40 is separate the slide 20 when the regulator is placed in a normal working position and / or when the liquid flows through it.
  • the regulator of the present invention is ergonomically designed so that it can be operated with one hand.
  • the base body 1 has a portion configured and sized on purpose so that it can be grasped with some fingers of one hand leaving the index and thumb fingers of this same hand free to grasp and rotate the drive sleeve 30.
  • the drive sleeve 30 includes non-slip reliefs 32 in an outer portion thereof.
  • the regulator of the present invention optionally comprises a graduated scale 39 arranged in the drive sleeve 30 and an indicator 19 disposed in the base body 10 in relation to said graduated scale 39, or vice versa, to indicate a liquid flow rate value as a function of the angular position of the sleeve of drive 30 with respect to the base body 10.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Lift Valve (AREA)

Abstract

Cette invention concerne un régulateur de débit pour diffuseur de liquide goutte-à-goutte comprenant un corps de base (10) pourvu d'un logement (11) ouvert à une première extrémité, un siège de valve conique (14) ménagé dans le fond du logement et un passage de sortie (15) communiquant avec le siège de valve et qui présente un port de sortie (12) ménagé à une seconde extrémité; une glissière (20) pourvue d'un port d'amenée (22) ménagé à une extrémité extérieure, d'une portion glissante (21) reçue de manière coulissante dans le logement (11), d'un obturateur de valve conique (24) placé à une extrémité intérieure, et d'un passage d'entrée (25) reliant le port d'amenée à des ouvertures latérales (26) ménagées dans l'obturateur de la valve conique; et une bague d'actionnement (30) couplée à une rondelle (16, 36) du corps de base (10), et pourvue d'une structure d'entraînement (37) couplée à une structure d'emboîtement (27) de la glissière de manière à entraîner la glissière avec le pivotement de la bague d'actionnement.
PCT/ES2007/000347 2006-06-12 2007-06-12 Régulateur de débit pour diffuseur de liquide goutte-à-goutte Ceased WO2007147915A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200601571 2006-06-12
ES200601571A ES2292349B1 (es) 2006-06-12 2006-06-12 Regulador de caudal para dispensar liquido gota a gota.

Publications (1)

Publication Number Publication Date
WO2007147915A1 true WO2007147915A1 (fr) 2007-12-27

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ID=38833101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2007/000347 Ceased WO2007147915A1 (fr) 2006-06-12 2007-06-12 Régulateur de débit pour diffuseur de liquide goutte-à-goutte

Country Status (2)

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ES (1) ES2292349B1 (fr)
WO (1) WO2007147915A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013512044A (ja) * 2009-11-25 2013-04-11 バクスター・インターナショナル・インコーポレイテッド 流れ制御を有する点滴筒
WO2015006892A1 (fr) * 2013-07-13 2015-01-22 Zhang Jianming Commutateur d'interruption d'écoulement pour cathéter de perfusion in vitro
CN105407942A (zh) * 2013-08-03 2016-03-16 张建铭 环槽定位式体外输液导管止流开关

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346704A (en) * 1980-09-09 1982-08-31 Baxter Travenol Laboratories, Inc. Sleeve valve for parenteral solution device
ES1015866U (es) * 1990-12-07 1991-09-16 Sacristan Ruano Jesus Regulador de caudal para goteos clinicos.
EP0664717A1 (fr) * 1992-10-15 1995-08-02 Health Care Technology Australia Pty. Ltd. Systeme d'administration intraveineuse
EP1270033A1 (fr) * 2001-02-28 2003-01-02 Victor Grifols Lucas Dispositif et procede de controle du debit pour produits medicamenteux
WO2005075009A1 (fr) * 2004-02-03 2005-08-18 Smjm Inject Gmbh Seringue pour anesthesie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346704A (en) * 1980-09-09 1982-08-31 Baxter Travenol Laboratories, Inc. Sleeve valve for parenteral solution device
ES1015866U (es) * 1990-12-07 1991-09-16 Sacristan Ruano Jesus Regulador de caudal para goteos clinicos.
EP0664717A1 (fr) * 1992-10-15 1995-08-02 Health Care Technology Australia Pty. Ltd. Systeme d'administration intraveineuse
EP1270033A1 (fr) * 2001-02-28 2003-01-02 Victor Grifols Lucas Dispositif et procede de controle du debit pour produits medicamenteux
WO2005075009A1 (fr) * 2004-02-03 2005-08-18 Smjm Inject Gmbh Seringue pour anesthesie

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013512044A (ja) * 2009-11-25 2013-04-11 バクスター・インターナショナル・インコーポレイテッド 流れ制御を有する点滴筒
WO2015006892A1 (fr) * 2013-07-13 2015-01-22 Zhang Jianming Commutateur d'interruption d'écoulement pour cathéter de perfusion in vitro
CN105407942A (zh) * 2013-08-03 2016-03-16 张建铭 环槽定位式体外输液导管止流开关
CN105407942B (zh) * 2013-08-03 2019-04-16 张建铭 环槽定位式体外输液导管止流开关

Also Published As

Publication number Publication date
ES2292349A1 (es) 2008-03-01
ES2292349B1 (es) 2008-10-16

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